They covered the entire journey barefoot in two days - September 4 and 5 - on a route that included walking through fields, forest, and normal roads, and an overnight stay in the St-Martin caves.

Their journey was also captured by local television network, Vosges Télévision; and a film was also made by Vosges local, Jean-Yves Barlier.

The duo dubbed their journey “a real communion with nature” and a “journey into the heart of our senses”.

Mr Duchêne said: “[Barefoot walking] is very good for the foot arch, because that is where all of your nerve endings are found. It is a permanent massage.”

On their Facebook page, the pair explained that “wearing shoes disconnects” people from the real world, and depletes energy. They add that barefoot walking increases confidence, stimulates nerve endings, reduces stress, and improves immunity.